Using parameterized commands helps guard against SQL injection attacks, in which an attacker "injects" a command into a SQL statement that compromises security on the server.
使用参数化命令有助于防范 SQL 投射攻击，在此类攻击中，攻击者会「投射」命令到 SQL 陈述式中，对伺服器的安全性造成危害。
These can be parameterized (p1, p2) and you can define the parameter variables later on, before using it in a plot command.
这些函数可以用参数(p 1, p2)表示，您可以稍后在plot命令中使用它们之前再定义参数变量。
Every command class created from the command pattern would write information to the log. This can include the name of the command class or any parameterized information in the pattern.
每个从command模式中建立的command类都会把信息写进日志，包括command类的名字或者模式中的任何参数信息。
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